TextBlock uses Run to concatenate Text values, which in certain cases may not be displayed

[ms1094392787]

Describe the bug

Above is my code to verify the problem

This is the normal effect

If there is a problem, you can see that the purple text is displayed normally. But the use of "Run" concatenation is already small

To Reproduce

I am using version "11.2.3". I currently have two views, one is empty and the other is this TextBlock page. This bug occurs when I switch between the two pages using the "RoutedViewHost" control

Expected behavior

No response

Avalonia version

11.2.3

OS

Windows

Additional context

This is everything I use Nuget package

[ms1094392787]

As if the above steps didn't cause the bug to reappear, I used a widget that controls the size of the region. Only when the original size is changed, the "RoutedViewHost" control switch will cause the "RUN" concatenated Text not to display

[ms1094392787]

But in my project it was stable and reproducible, and I can confirm that there were certain conditions that caused problems with "RUN"

[Gillibald]

Whitespace is always normalized within the TextBlock's content. So you get an extra space for the linebreak within the XAML. Write everything on one line an it should work as you want.